High-Voltage Bypass Path Using Flowable Conductive Material
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Solution Overview
Problem
High voltage installations face complexity and high costs due to the use of mechanical or semiconductor-based bypass switches, which are often required to be redundant for reliability, adding significant cost and complexity.
Innovation Solution
A high voltage bypass device with a cavity, trigger element, and conductive flowable material that forms a conductive path upon an overvoltage condition, eliminating the need for active control or cooling, using spark gaps and heat-sensitive shutters for activation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If mechanical bypass switches or semiconductor protection devices are used, then reliable operation is ensured, but device complexity and cost increase significantly
Solution Approach 1:
The patent extracts the active control and cooling systems from the bypass device, retaining only the essential passive components (shutter, conductive material, trigger element) needed for overvoltage protection. This eliminates complex control electronics and forced cooling mechanisms while maintaining reliability through passive operation.
Solution Approach 2:
The bypass device operates autonomously using passive components that automatically respond to overvoltage conditions without external control. The trigger element detects overvoltage and activates the shutter mechanism, while the conductive material self-regulates current flow, eliminating the need for active control systems and reducing overall device complexity.
2Reliability
If mechanical bypass switches or semiconductor protection devices are used, then reliable operation is ensured, but cost increases significantly
Solution Approach 1:
The patent employs a simple, disposable-like approach where the bypass device uses basic passive components (shutter, conductive material, trigger element) that can be manufactured at low cost. The device is designed for single-use or limited-use scenarios where replacement is simpler and cheaper than maintaining complex active systems, significantly reducing overall cost while ensuring reliability during operational life.
Solution Approach 2:
The patent replaces complex mechanical control systems and semiconductor-based active protection devices with a simpler passive mechanical-shutter-based system. This substitution eliminates expensive control electronics, sensors, and cooling infrastructure, reducing manufacturing costs while maintaining the core function of overvoltage protection and reliable operation.
3Ease of operation
If semiconductor-based protection devices are used, then bypass functionality is achieved, but active cooling is required adding complexity and cost
Solution Approach 1:
The patent completely removes the cooling system from the bypass device architecture, relying instead on passive heat dissipation through the conductive material and surrounding structure. This extraction of the cooling subsystem eliminates complex thermal management requirements while maintaining bypass functionality through the passive operational characteristics of the remaining components.
Solution Approach 2:
The bypass device operates without external cooling infrastructure by using passive heat dissipation mechanisms. The conductive material and surrounding structure naturally dissipate heat generated during operation, eliminating the need for active cooling systems and reducing device complexity while maintaining full bypass functionality.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The device provides reliable operation with reduced complexity and cost, enabling easy integration and maintaining system functionality even in the event of component failure.
Implementation Method 1
the trigger element is configured to generate heat in case of an overvoltage condition and the shutter comprises a heat sensitive material, in particular a polymer material, which is at least partially destroyed by one of melting, evaporation or combustion
Implementation Method 2
the trigger element comprises a first electrode connected to the first terminal, and a second electrode connected to the second terminal, the first electrode and the second electrode extending into the cavity and forming a spark gap therein
Implementation Method 3
the conductive, flowable material comprises at least one of a liquid, a powder and/or a granular material. Such materials can freely flow, for example under the influence of gravity or another external force, from the reservoir to the cavity
Data Source
AI summary
The present disclosure relates to a high voltage bypass device, comprising a cavity, a trigger element arranged in the cavity, a reservoir filled with a conductive, flowable material, and a shutter separating the cavity and the reservoir. The trigger element is connected to a first terminal and a second terminal of the high voltage bypass device. The shutter is configured to open a passage between the cavity and the reservoir in case the trigger element is triggered by an overvoltage condition, such that the conductive, flowable material at least partially fills the cavity, thereby forming a conductive path from the first terminal to the second terminal. The present disclosure further relates to a voltage source converter (VSC), in particular a modular multi-cell converter, and an operating method for a high voltage bypass device.